By Tobias Adrian and Tommaso Mancini-Griffoli

عربي, 中文, Español, Français, 日本語, Português, Русский 

We value innovation and diversity—including in money. In the same day, we might pay by swiping a card, waving a phone, or clicking a mouse. Or we might hand over notes and coins, though in many countries increasingly less often. […]